l .Vhilbrick
Solid State
PHILBRICK produces a wide variety of
cool, reliable, solid state operational ampli¬
fiers to meet the gamut of application
requirements in measurement, computing,
control, data processing, and testing.
The units shown in this chart are the most
popular types now in production. In
addition to these, Philbrick is developing
new and improved types to meet the
ever-increasing challenges to operational
amplifier performance. Besides basic
amplifiers, one can obtain voltage and cur¬
rent boosters, regulated dc power
supplies, non-linear transconductors and op¬
erational manifolds from Philbrick. You
are invited to discuss the application of
operational amplifiers to the solution
of your problems with Philbrick or our near¬
est Representative.
BULLETIN 6111
December 1966
PHILBRICK <j> RESEARCHES
UTILITY-GRADE
Philbrick Utility-Grade Amplifiers, identified by the
letter “U” following the family number (e.g.PP85AU), are
identical to premium-grade prototypes in circuitry, layout,
manufacturing techniques, and the exclusive use of silicon
transistors and first-grade passive components from leading
U. S. manufacturers.
The substantial price difference between premium and
utility-grade amplifiers is achieved by the following means:
The use of silicon transistors encapsulated in highly
moisture-resistant silicone plastic (Note: not epoxy!)
instead of hermetically-sealed amplifiers.
Use of capacitors which are guaranteed from —55 to
+ 85°C, instead of the —65 to +125°C units normally
used in Premium-Grade products.
All room-temperature tests are carried out with the
thoroughness that has earned Philbrick an enviable
reputation for reliability; complete temperature tests
are run on representative samples of each production
run to confirm compliance with published specifications.
Use of date codes and go-no-go tests instead of serial
numbers and recording of data as normally required for
all premium units (Government Inspection and/or cer¬
tified test results are available, upon request, for
premium units.)
In performance, the Utility-Grade amplifiers (except
those in the P2 Series) are identical to their Premium-Grade
counterparts. As temperature tests are conducted on samples
only, tolerances outside the 10°-60°C range are relaxed as
compared with the corresponding specifications for the
premium amplifier.
Philbrick Utility-Grade amplifiers may be substituted
in virtually all applications for which their Premium-Grade
counterparts are and have been originally recommended.
CURRENT COMPENSATION
Philbrick differential operational amplifier families P35
through P85 contain input stages with matched pairs of
junction transistors in a common emitter configuration.
Emitter current being kept constant, each transistor requires
a “housekeeping” current into its base amounting to emitter
current divided by p (current gain). By selecting high-/? tran¬
sistors and low emitter currents, these base currents can be
made as small as 10- 8 amperes, but they can never be elim¬
inated, and they increase as temperature decreases. If the
base currents of input transistors are not supplied by current
sources within the amplifier, an output voltage error will re¬
sult because this offset current produces a voltage drop
across the feed-back impedance (in an inverter) or the signal
source impedance (in a voltage follower).
The simplest form of base current supply is a resistor
from +B to each base. P45A, P55A, P65A and P85A families
have these built in, while the proper resistance values for
external installation are marked on their PP equivalents.
Although these current trim resistors are inexpensive, they
are most effective within narrow temperature limits and
where high common-mode voltages do not occur. After all, p,
and with it base current do change with temperature, and a
resistor is a constant current source only as long as the
voltage across it remains constant!
Philbrick Current Compensated Amplifiers, identified by
the letter C following the family number, have built-in base
current sources which closely track current demand over the
entire operating temperature range.
The P35C and P85C series contain a sophisticated
compensating circuit which leaves the outstanding common
mode voltage rejection ratio, the common mode voltage
range, and the input impedances unaffected. An additional
feature of this compensating circuit is a provision for nulling
either input current completely by applying an adjustable
voltage bias (±5 volts maximum) to a terminal provided for
the purpose. The P45C and P65C series contain a simpler
compensating circuit which provides a fivefold decrease in
offset current over the entire temperature range, but also
reduces the common mode rejection ratio, the common
mode voltage range, and the input impedance.
CHARACTERISTICS
Typical at + 25°C unless otherwise indicated
1. VOLTAGE GAIN (DC open loop)
At +25°C, rated load,.min.
10 kn load,.min.
100 kn load,.min.
At -25°C, rated load,.min.
At +85°C, rated load,.min.
2. RESPONSE (open loop, inverting)
Small signal: Unity gain-bandwidth.min.
Gain at 1.0 MHz
Gain at 10 MHz
Large signal: Full output .min.
Rate limit
3. INPUT VOLTAGE RANGE
Voltage range, both inputs
Voltage range, between inputs ....abs. max.
CMRR, DC.min.
4. INPUT IMPEDANCE
Between inputs
Negative input to common
Positive input to common
5. INPUT VOLTAGE OFFSET
Zero adjustment (external)
Vs Temp. (+ 10°C to +60°C),.max.
Vs Temp. (—25°C to + 85°C),.max.
Vs Time (per day)
Vs Time (Vz hour)
6. INPUT CURRENT OFFSET
25°C .max.
Vs Temp. ( + 10°C to +60°C),.max.
Vs Temp. (-25°C to +85°C).max.
Vs Time (per day)
Vs Time (Vz hour)
7. INPUT NOISE
(a) Flicker (0.016 to 1.6 Hz)
voltage p-p
current p-p
(b) Broadband (1.6 to 160 Hz)
voltage rms
current rms
(c) Broadband (0.16 to 16 kHz)
voltage rms
current rms
8. OUTPUT (— 25°C to +85°C)
Voltage
Current
Load (rated)
9. POWER REQUIREMENTS X
Voltage
Current from positive supply: (Quiescent)
(Full Load)
Current from negative supply: (Quiescent)
(Full Load)
10. TEMPERATURE RANGE (degrees Centigrade)
Operating: Rated
Derated specifications .max.
Storage .max.
PRICE (quantity 1-4) Price of “Alternate Forms”
may be slightly different. Prices may change
without notice.
ALTERNATE FORMS
These units belong in the same family as the
prototype because they have nearly equiva¬
lent circuit configurations. They may differ
significantly from the listed types in electri¬
cal or physical characteristics, or applica¬
tions considerations. Philbrick Researches
welcomes your inquiry regarding these and
other modified forms of standard units.
UTILITY GRADE
Where indicated a utility grade equivalent
denoted by the letter U following the model
designation, is available at reduced price.
Utility grade amplifiers have identical per¬
formance with their premium grade equiva¬
lents in the temperature range 0-60°C.
Storage temperatures below — 55°C and
above + 85°C and certified test data are
not available.
PP12Q
Battery operated
High input impedance
Low offset current
PP18Q
Battery operated
Differential
PP25A
High input impedance
Low offset current
Q25AH
Differential
Wideband
Low offset current
PP35A
Differential
High input impedance
Low voltage offset
PP35C
Differential
Input current compensated
High input impedance
Low offset voltage
PP45
Ultra wideband
Large output current
5,000
5,000
40,000
20,000
100,000
100,000
50,000
20,000
20,000
80,000
35,000
200,000
200,000
200,000
30,000
30,000
150,000
80,000
1,000,000
1,000,000
300,000
2,000
2,000
30,000
15,000
40,000
40,000
20,000
2,000
2,000
60,000
15,000
150,000
150,000
100,000
50 kHz
50 kHz
1.5 MHz
30 MHz ▼
4 MHz
4 MHz
100 MHz
_
2
40
6
6
140
_
_
4
—
14
1 kHz
1 kHz
10 kHz
0.1 MHz
8 kHz
8 kHz
300 kHz
20 V/ms
20 V/ms
0.6 V//i-sec
8 V/ft-sec
0.5 V//j.- sec
0.5 V//n-sec
200 V/ju-sec
±0.2 V
± 0.5 V
±10 V
±10 V
±10 V
±10 V
±10 V
2.7 V
2.7 V
30 V
30 V
5 V
5 V
5 V
1000:1
5000:1
1000:1
5,000:1
20,000:1
20,000:1
1000:1
10"n || 6 pF
0.4 Mn || 6 pF
10''nil 6pF
10"n|| 3 pF
5Mn H 5 pF
5Mn II 5 pF
220 kn || 6 pF
10 12 n ii 6 pF
15 Mo || 6 pF
10' 2 n II6 pF
10 ,2 n|| 6 pF
2(10»)n|l27 pF
2(10 9 )nll 27 pF
33 Mn || 0.01/xF
10 ,2 n || 6 pF
15 Mo II 6 pF
10' 2 n || 6 pF
10’ 2 n II6 pF
2(10 9 )nll27 pF
2(10 9 )nll 27 pF
33 Mnil 6 pF
10 kn Rhst.
10 ko Rhst.
5 kn Rhst.
10 kn & 250 kn Pot.
2.5 kn Pot.
2.5 kn Pot.
50 kn Rhst.
3 mV
3 mV
3 mV
3 mV
1 mV
1 mV
2.5 mV
6 mV
6 mV
6 mV
6 mV
3 mV
3 mV
6 mV
50 ,iV
50 M V
50 f,V
50 M V
25 mV
25 /xV
100 ;xV
10 M V
10 M V
10 M V
10 mV
10 ^V
10 /xV
15 /xV
•
-100 pA
-4-50 nA *
-150 pA
-150 pA
+20 nA
±4 nA**
±50 nA*
1 nA
200 nA
1 nA
1 nA
20 nA
4 nA
150 nA
10 nA
440 nA
10 nA
10 nA
45 nA
10 nA
300 nA
3 pA
5 nA
3 pA
3 pA
1 nA
1 nA
30 nA
1 pA
0.5 nA
IpA
1 pA
0.1 nA
0.1 riA
3 nA
5 m V
5 M V
5,xV
5 mV
10 mV
10 ^V
5 ^V
2 pA
0.25 nA
2 pA
2 pA
0.05 nA
0.05 nA
0.5 nA
2,xV
1 M V
2,*V
2 m V
10
10 M V
1 mV
3 pA
30 pA
1 pA
IpA
6 pA
6 pA
600 pA
2 m V
1 fxV
2 /aV
2 /uV
10 M V
10 mV
1 mV
3 pA
30 pA
3 pA
3 pA
6 pA
6 pA
600 pA
-4-1 V
±1 V
-t-ll V
±11 V
±11V
±11 V
±10 V
-4-2 mA
±2mA
-4-2.2 mA
±2.2 mA
±2.2 mA
±2.2 mA
±20 mA
500 n
500 o
5kn
5 kn
5 kn
5 kn.
500 n
± 1.35 V
-4-1.35 V
±15 V
±15 V
±15 V
±15 V
±15 V
0.8 mA
0.4 mA
4.6 mA
6.6 mA
6 mA
6 mA
4 mA
2.8 mA
2.4 mA
4.6 mA
6.6 mA
6 mA
6 mA
23 mA
0.8 mA
0.4 mA
4.6 mA
6.6 mA
6 mA
6 mA
4 mA
2.8 mA
2.4 mA
6.8 mA
8.8 mA
8.2 mA
•
8.2 mA
23 mA
-25 to +85
-25 to +85
-25 to +85
-55 to +125
— 25 to +85
-25 to +85
— 25 to +85
-55 to +100
-55 to +100
— 55 to +100
-55 to +100
-55 to +100
-55 to +100
-62 to +125
— 62 tp +125
-62 to +125
-62 to +150
-62 to +125
-62 to +125
-62 to +125
$145
$85
$135
$180
$98
$118
$118
P12Q ■ $145
P18Q ■ $85
PP25C and P25C ■
P25AH ▼ ■ $154
PP35A1 and P35A1 ■
PP35C1 and P35C1 ■
P45A ■ $118
have input currents ap-
are units selected for
are units selected for
proximately 1/10 of
less than 1 mV input
less than 1 mV input
those given for PP25A
voltage offset ( — 25°C
voltage offset f — 25°C
at any given temper-
to +85°C). $128
to +85°C). $128
ature. $145
P35A ■ $98
P35C ■ $118
\
t
P25A ■ $135
EP12QU A $108
EP18QU a $59
EP25AU A $85
EP35AU a $60
EP45AU A $87
PP12QU $108
i
PP18QU $59
PP25AU $79
PP35AU $54
PP45U $89
SUGGESTED BOOSTER TYPES (used with operational amplifiers for voltage or current boost; connected inside the loop)
P66A .delivers ±10 V at ±100 mA with external "Boost” resistors connected; ±20 mA without.
PP66A .delivers same power output as Model P66A.
P5.delivers ±10 V at ±20 mA; physical companion of P2A.
0SPB -50/50 delivers ±50 V at ±50 mA with external “Boost” resistors connected; ±10 mA without; has DC gain of 7;
requires ±60 V supplies.
0SPB-100/10 delivers ±100 VDC at ±10 mA with external “Boost” resistors connected; ±1.5 mA without; has DC gain of 20;
requires ±120 VDC supplies.
Physical Form
P
PP
P2A
0SP
0SP
Price (quantity 1-4)
$39
$40
$48
$85
$85
FLAT-PROFILE PACKAGE
“FLAT-PROFILE” amplifiers (FP), only 0.4” in height, are available in OEM
quantities to permit 0.5” printed circuit board spacing. Most "PP” amplifiers
described above and some boosted models not available in the "PP” package
may be ordered in the “FP” model.
PP45C
Ultra wideband
Large output current
Input current compensated
PP45L
Large output current
PP55A
Low cost
Premium
grade construction
PP65A
Versatile
PP65C
Versatile
Input current
compensated
PP65AH
Wideband
Versatile
PP75A
High input impedance
PP85A
Differential
Low voltage offset
PP85C
Differential
Low voltage offsel
Input current
compensated
50 000
50,000
20,000
40,000
40,000
40,000
20,000
50,000
50,000
200 000
200,000
40,000
75,000
75,000
75,000
40,000
90,000
90,000
300 000
300,000
60,000
180,000
180,000
180,000
80,000
200,000
200,000
20 000
20,000
10,000
20,000
20,000
20,000
10,000
20,000
20,000
100^000
100,000
30,000
50,000
50,000
50,000
40,000
60,000
60,000
100 MHz
1.5 MHz
1.5 MHz
1.5 MHz
1.5 MHz
20 MHz
1.5 MHz
2 MHz
2 MHz
140
2
3
3
3
25
3
3
3
3
14
300 kHz
10 kHz
20 kHz
20 kHz
20 .kHz
75 kHz
20 kHz
10 kHz
10 kHz
200 V/^-sec
0.6 V/jtt-sec
1.5 V//X-sec
1.5 V//x-sec
1.5 V//x-sec
5 V//x-sec
1.5 V/V-sec
0.6 V//x-sec
0.6 V//x-sec
+5 V
+10 V
+ 10 V
+ 10 V
+ 5 V
+ 10 V
+ 10 V
+ 11 V
+ 11 V
5 V
5 V
5 V
5 V
5 V
5 V
10 V
5 V
5 V
300:1
1000:1
1000:1
1000:1
300:1
1000:1
1000:1
20 , 000:1
20 , 000:1
220 kn|| 6 pF
220 kQ II 6 pF
200kQ II 7pF
300kQ II 6 pF
300kn || 6 pF
300kn || 6 pF
lOMnii 6 pF
330kQll 6 pF
330kQ II 6 pF
15 Mq|| 0.01 m F
33 Mq II1000 pF
15Mn II 400pF
44Mq || 400pF
22Mq ll 400pF
44Mn j| 400pF
500MQII 400pF
500MQII 6 pF
500MQII 6 pF
15 Mall 6 pF
33 Mq || 6 pF
15Mq II 8 pF
44Mq || 6 pF
22 MQII bpF
44Mn || 6 pF
500Mqii 6 pF
500MQII 6 pF
500MQII 6 pF
50 kQ Rhst.
50 kn Rhst.
50 kQ Rhst.
50 kQ Rhst.
50 kn Rhst.
50 kn Rhst.
50 kn Rhst.
50 kQ Rhst.
50 kQ Rhst.
2.5 mV
2.5 mV
2 mV
1.5 mV
1.5 mV
1.5 mV
3 mV
1 mV
1 mV
6 mV
6 mV
6 mV
4 mV
4 mV
4 mV
12 mV
3 mV
3 mV
100
100 M V
100 juV
50 ,xV
50 ,xV
50 M V
100 ,xV
50 ,xV
50 ^
15 h \l
15 M V
25 fxV
10 ^V
10 ,xV
10 . M V
25 /xV
10 ,xV
10 juV
—i— 50 nA
+50 nA*
+50 nA*
+ 50 nA*
+50 nA
+50 nA*
+ 20 nA
+ 50 nA*
+50 nA **
50 nA
150 nA
300 nA
150 nA
50 nA
150 nA
20 nA
150 nA
50 nA
150 nA
300 nA
600 nA
300 nA
100 nA
300 nA
60 nA
300 nA
100 nA
30 nA
30 nA
30 nA
10 nA
10 nA
10 nA
1 nA
5 nA
5 nA
3 nA
3 nA
3 nA
1 nA
. " .
1 nA
1 nA
0.1 nA
0.5 nA
0.5 nA
5 M V
5 /xV
15 ,xV
10 M V
10 M V
10 M V
20 M V
5 /xV
5 /xV
0.5 nA
0.5 nA
1 nA
0.5 nA
0.5 nA
0.5 nA
0.05 nA
0.25 nA
0.25 nA
1 M V
1 M V
2 M V
1 ^
1 fxV
1 M V
10 /xV
1 uV
1 uV
600 pA
60 pA
100 pA
60 pA
60 pA
60 pA
6 pA
30 pA
30 pA
1 ,xV
1 ^
2 /xV
1 /aV
1 ,xV
1 /xV
10 ^V
1 ,xV
1 uV
600 pA
60 pA
100 pA
60 pA
60 pA
60 pA
6 pA
30 pA
30 pA
-i-10 V
+ 10 V
+ 11 V
+ 11 V
+ 11 V
+ 11 V
+ 11 V
+ 11 V
+ 11 V
-t -20 mA
+20 mA
+2.2 mA
+2.2 mA
+2.2 mA
+ 2.2 mA
+2.2 mA
+ 2.2 mA
+ 2.2 mA
500 Q
500 Q
5 kQ
5 kn
5 kn
5 kn
5 kQ
5 kQ
5 kQ
+ 15 V
+ 15 V
+ 15 V
+ 15 V
+ 15 V
+ 15 V
+ 15 V
+ 15 V
+ 15 V
4 mA
4 mA
5.5 mA
5.5 mA
5.5 mA
5.5 mA
5.5 mA
4 mA
4 mA
23 mA
23 mA
7.7 mA
7.7 mA
7.7 mA
7.7 mA
7.7 mA
4 mA
4 mA
4 mA
4 mA
5.5 mA
5.5 mA
5.5 mA
5.5 mA
5.5 mA
4 mA
4 mA
23 mA
23 mA
5.5 mA
5.5 mA
5.5 mA
5.5 mA
5.5 mA
6.2 mA
6.2 mA
— 25 to +85
-25 to +85
— 25 to +85
-25 to +85
-25 to +85
— 25 to +85
-25 to +85
— 25 to +85
— 25 to +85
— 55 to +100
-55 to +100
-55 to +100
-55 to +100
— 55 to +100
-55 to +100
— 55 to +100
-55 to +100
-55 to +100
-62 to +125
-62 to +125
-62 to +125
-62 to +125
-62 to +125
-62 to +125
-62 to +125
-62 to +125
-62 to +125
$135
$95
$49
$60
$75
$64
$98
$60
$80
P45C ■ $133
P45AL ■ $95
PP55AH and P55AH •
P65A ■ $65
PP65CH $79 and
P65AH ■ $69
P75A ■ $98
PP85A1 and P85A1 ■
P85C ■ $80
PP45CL and P45CL ■
are stable wide-band
PP65Q $64 and P65Q1
P65CH «$84 are wide-
are units selected for
have input current off-
versions. $53
$69 have +0.9 mA
band versions
less than 1 mV input
sets and common
P55A • $49
quiescent battery
P65C ■ $80
voltage offset ( — 25°C
mode parameters iden-
drain, +0.5 mA full
to +85°C). $70 and $75
tical to those of PP45C
output.
P85A «$65
$110
EP45ALU A $63
EP55AU ♦ $19
EP65AU A $31
EP65AHU A $35
P75AU ■ $68
EP85AU a $ 3 i
PP45LU $65
PP55AU $15
PP65AU $30
PP65AHU $34
PP75AU $68
PP85AU $25
EP55AHU ♦ $23
EP65QU A $35
PP55AHU $19
PP65QU $34
F*H I L/EJFtlCK.
RESEARCHES
Allied Drive at Route 128, Dedham, Massachusetts 02026
U.S.A-
Q85AH
SP2A
SP65A t
SP65AH t
Differential wideband
Differential
Stabilized
Stabilized
Low voltage offset
Ultra low offset current
Floating input
Wideband
20,000
20,000
lO 2
102
40,000
40,000
2 x 102
2 x 102
80,000
150,000
4x 102
4x102
15,000
10,000 (0°C)
5 x 10*
5 x 10*
15,000
10,000 (65°C)
4x102
4x 102
30 MHz ▼
75 kHz
1.5 MHz
20 MHz
50
3
-25
5
—
_
2.5
0.1 MHz
1.1 kHz
20 kHz
75 kHz
8 V//x-sec
.066 V/m- sec
1.5 V/M-sec
•
5 V/m- sec
+ 11 V
+300 V
+0.1 V
+0.1 V
10 V
15 V
0.5 V
0.5 V
20 , 000:1
Infinite
—
—
2Mnil 3pF
10ioa||500 pF
500Moll 5pF
10i 2 12|| 5 pF
1.3M12II 300pF
1.3Mall 300pF
500MOII 5pF
10i 2 a|| 5 pF
—
—
10 ka & 250 ka Pot.
Built-in
IMa&lOO ka Pot.
IMa&lOO ka Pot.
1 mV
—
20 mV (5 mV typ.)
20 mV (5 mV typ.)
3 mV
6 mV (0° to 65°C)
50 mV (20 mV typ.)
50 mV (20 mV typ.)
50 M V
100 mV
1 mV
1 mV
10 M V
10 mV
1 mV
1 mV
220 nA
+ 1 pA
10 pA
10 pA
220 nA
—
30 pA
30 pA
440 nA
10 pA (0° to 65°C)
100 pA
100 pA
5 nA
0.1 pA
10 pA
10 pA
0.5 nA
0.01 pA
2 pA
2 pA
5 mV
1 mV
6 mV
6 mV
0.25 nA
1 fA
0.1 nA
0.1 nA
1 mV
10 mV p-p
10 mV p-p
10 mV p-p
30 pA
■
—
1 mV
10 mV
1 mV
1 mV
30 pA
500 pA
60 pA
60 pA
+ 11 V
+ 11V
+ 11 V
+ 11 V
+2.2 mA
+ 2.2 mA
+2.2 mA
+2.2 mA
5 ka
5 ka
5 ka
5 ka
+ 15 V
+ 15 V
+ 15 V
+ 15 V
6 mA
8 mA
8 mA
8 mA
6 mA
8 mA
10 mA
10 mA
6 mA
6 mA
7 mA
7 mA
8.2 mA
8.2 mA
7 mA
7 mA
-55 to +125
0 to +65
-25 to +85
— 25 to +85
-25 to +85
— 45 to +85
—45 to +85
-62 to +150
— 55 to + 85
— 55 to +85
— 55 to +85
$161
$180
$180
$189
P85AH $98
P2A $227 is a wire-in
version of SP2A. It has
no provision for a driven
guard SP2B $195 has
20 mA output current
capability. SP102 $295
has +100 V @ 10 mA
output capability.
j P2AU a ▲ $130
SP2AU A A $138
SP2BU a A $145
SP6561
Stabilized
Large output current
SP4561
Stabilized
Wideband
Large output current
5x102
108
10 «
4x108
2 x 10 ®
4x108
2.5 x 102
5x102
10 «
2 xl 0 »
1.5 MHz
100 MHz
3
140
—
14
20 kHz
300 kHz
1.5 V/M-sec
200 V/M-sec
+0.1 V
+0.1 V
0.5 V
0.5 V
1.3 Mall 300pF
1.3 Ma II O.OImF
IMa&lOO ka Pot.
IMa &100 ka Pot.
20 mV (5 i*V typ.)
20 mV (5 mV typ.)
50 mV (20 mV typ.)
50 mV (20 mV typ.)
1 mV
1 mV
1 mV
1 mV
10 pA
10 pA
30 pA
30 pA
100 pA
100 pA
10 pA
10 pA
2 pA
2 pA
6 mV
6 mV
0.1 nA
0.1 nA
10 mV p-p
10 mV p-p
1 mV
1 mV
60 pA
600 pA
+ 10V
+10V
+20 mA
+20 mA
500 a
500 a
+ 15 V
+15 V
8.75 mA
5 mA
28 mA
24.5 mA
8.75 mA
4.5 mA
28.5 mA
24 mA
-25 to +85
— 25 to +85
—45 to +85
-45 to +85
-55 to +85
— 55 to + 85
•$195
$227
CHARACTERISTICS
Typical at +25°C unless otherwise indicated
1. VOLTAGE GAIN (DC open loop)
At +25°C, rated load,.min.
10 ka load.min.
100 ka load,.min.
At -25°C, rated load,.min.
At + 85 C, rated load,.min.
2. RESPONSE (open loop, inverting)
Small signal: Unity gain-bandwith.min.
Gain at 1.0 MHz
Gain at 10 MHz
Large signal: Full output .min.
Rate limit
3. INPUT VOLTAGE RANGE
Voltage range, both inputs
Voltage range, between inputs ....abs. max.
CMRR, DC.min.
4. INPUT IMPEDANCE
Between inputs
Negative input to common
Positive input to common
5. INPUT VOLTAGE OFFSET
Zero adjustment (external)
Vs Temp. ( + 10°C to + 60°C),.max.
Vs Temp. (— 25°C to +85°C),.max.
Vs Time (per day)
Vs Time (V 2 hour)
6 . INPUT CURRENT OFFSET
25°C .max.
Vs Temp. ( + 10°C to +60°C).max.
Vs Temp. ( — 25°C to +85°C).max.
Vs Time (per day)
Vs Time (V 2 hour)
7. INPUT NOISE
(a) Flicker (0.016 to 1.6 Hz)
voltage p-p
current p-p
(b) Broadband (1.6 to 160 Hz)
voltage rms
current rms
(c) Broadband (0.16 to 16 kHz)
voltage rms
current rms
8 . OUTPUT (-25°C to 4 85°C)
Voltage
Current
Load (rated)
9. POWER REQUIREMENTS t
Voltage ,
Current from positive supply: (Quiescent)
(Full Load)
Current from negative supply: (Quiescent)
(Full Load)
10. TEMPERATURE RANGE (degrees Centigrade)
Operating: Rated
Derated specifications .max.
Storage .max.
PRICE (quantity 1-4) Price of “Alternate Forms”
may be slightly different. Prices may change
without notice.
ALTERNATE FORMS
These units belong in the same family as the
prototype because they have nearly equiva¬
lent circuit configurations. They may differ
significantly from the listed types in electri¬
cal or physical characteristics, or applica¬
tions considerations. Philbrick Researches
welcomes your inquiry regarding these and
other modified forms of standard units.
UTILITY GRADE
Where indicated a utility grade equivalent
denoted by the letter U following the model
designation, is available at reduced price.
Utility grade amplifiers have identical per¬
formance with their premium grade equiva¬
lents in the temperature range 0-60 c C.
Storage temperatures below — 55°C and
above +85°C and certified test data are
not available.
LEGEND
M — mega —10 6
k — kilo —10 3
m — milli — 10 -3
fji — micro — 10 6
/ n —nano — 10 9
p — pico — 10 12
f — femto — 10 15
FOOTNOTES
■ A plug-in version in bright-metal case having similar performance. Voltage
offset adjustment built-in.
♦ A plug-in epoxy version having similar performance. Voltage offset
adjustment external.
• A plug-in version in bright-metal case having similar performance. No
built-in voltage offset adjustment.
a A plug-in epoxy version having similar performance
Voltage offset adjustment built-in.
* With specified external current trim resistors installed. P models have built-in
current trim resistors.
** With “Trim I” terminal grounded. Can be trimmed to zero by voltage bias
(±5 V Max.) applied to “Trim I" terminal.
▼ Roll-off network connected externally.
t Specifications shown are for units with mechanical chopper; 6.3 VAC, 50-80 cps
at 80 mA is required. Units with photochopper are available for operation
below +65°C. In addition to 6.3 VAC, 50-80 cps, 1 mA, the photochopper
also requires 115 VAC, 5 mA, at the same frequency and phase.
$ At + 85°C power requirements will be 10% higher than those stated at +25°C. For
maximum power requirements at any temperature add ± 10 %.
a* These utility versions have wider tolerances for voltage offset
vs temperature, and input current, than premium equivalents.
S>SC\
Hot J) 9/iv/w
PHILBRICK (j> RESEARCHES
UTILITY-GRADE
Philbrick Utility-Grade Amplifiers, identified by the
letter “U" following the family number (e.g.PP85AU), are
identical to premium-grade prototypes in circuitry, layout,
manufacturing techniques, and the exclusive use of silicon
transistors and first-grade passive components from leading
U. S. manufacturers.
The substantial price difference between premium and
utility-grade amplifiers is achieved by the following means:
The use of silicon transistors encapsulated in highly
moisture-resistant silicone plastic (Note: not epoxy!)
instead of hermetically-sealed amplifiers.
Use of capacitors which are guaranteed from —55 to
+ 85°C, instead of the —65 to +125°C units normally
used in Premium-Grade products.
All room-temperature tests are carried out with the
thoroughness that has earned Philbrick an enviable
reputation for reliability; complete temperature tests
are run on representative samples of each production
run to confirm compliance with published specifications.
Use of date codes and go-no-go tests instead of serial
numbers and recording of data as normally required for
all premium units (Government Inspection and/or cer¬
tified test results are available, upon request, for
premium units.)
In performance, the Utility-Grade amplifiers (except
those in the P2 Series) are identical to their Premium-Grade
counterparts. As temperature tests are conducted on samples
only, tolerances outside the 10°-60°C range are relaxed as
compared with the corresponding specifications for the
premium amplifier.
Philbrick Utility-Grade amplifiers may be substituted
in virtually all applications for which their Premium-Grade
counterparts are and have been originally recommended.
CURRENT COMPENSATION
Philbrick differential operational amplifier families P35
through P85 contain input stages with matched pairs of
junction transistors in a common emitter configuration.
Emitter current being kept constant, each transistor requires
a "housekeeping" current into its base amounting to emitter
current divided by j3 (current gain). By selecting high-/? tran¬
sistors and low emitter currents, these base currents can be
made as small as 1CH 5 amperes, but they can never be elim¬
inated, and they increase as temperature decreases. If the
base currents of input transistors are not supplied by current
sources within the amplifier, an output voltage error will re¬
sult because this offset current produces a voltage drop
across the feed-back impedance (in an inverter) or the signal
source impedance (in a voltage follower).
The simplest form of base current supply is a resistor
from + B to each base. P45A, P55A, P65A and P85A families
have these built in, while the proper resistance values for
external installation are marked on their PP equivalents.
Although these current trim resistors are inexpensive, they
are most effective within narrow temperature limits and
where high common-mode voltages do not occur. After all, j3,
and with it base current do change with temperature, and a
resistor is a constant current source only as long as the
voltage across it remains constant!
Philbrick Current Compensated Amplifiers, identified by
the letter C following the family number, have built-in base
current sources which closely track current demand over the
entire operating temperature range.
The P35C and P85C series contain a sophisticated
compensating circuit which leaves the outstanding common
mode voltage rejection ratio, the common mode voltage
range, and the input impedances unaffected. An additional
feature of this compensating circuit is a provision for nulling
either input current completely by applying an adjustable
voltage bias (±5 volts maximum) to a terminal provided for
the purpose. The P45C and P65C series contain a simpler
compensating circuit which provides a fivefold decrease in
offset current over the entire temperature range, but also
reduces the common mode rejection ratio, the common
mode voltage range, and the input impedance.
AMPLIFIER TEST CIRCUITS
OPEN LOOP GAIN
& OUTPUT CAPABILITY
DC open loop gain, A, and output capability may be measured
at 20 Hz. Of chopper stabilized amplifiers, only the main ampli¬
fier gain is measured in this manner, overall DC gain being too
high to measure. For SP2A the gain measurement should be
carried out at no more than 3 Hz.
e H
A = 101 ~^ L
e v
VOLTAGE OFFSET
Voltage offset, e 0 , vs. temperature and/or time may be meas¬
ured after the voltage offset central has been adjusted for zero
output at room temperature. For best accuracy allow the
amplifier to warm up for 30 minutes before adjusting to zero.
INPUT CURRENT
Input currents should be measured after the voltage offset has
been nulled. If amplifiers have too little input current to be
measured in this manner (SP2A, P25A, Q25AH, chopper
stabilized amplifier) the 1M12 resistors should be omitted, and
the output change timed, i = C de/dt or 1 pA = 10 mV/sec.
TRACK
+e v
1 Mil
'+
~ e v
1MO.
R^ioon r 2 =iook
Alabama
Huntsville
205-536-8393
Illinois
Chicago
312-676-1100
New York
Buffalo
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312-676-1101
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